Engine light flashes for 15 seconds ?????

[Stoned06]

yup, misfire. but the problem, like blacklow said, is they cant pinpoint it if the light isnt on. it sounds like you are on the verge of cop/plug fowl. then the light will stay on till you fix it.

Not necessarily. My light went out on my '06 and the scanner still picked up that the code was thrown. And they scan it for free. I purchased 1 plug and Coil Pack and swapped out the ones that were associated with the miss-firing cylinder.

 

[PAPARAZZI]

OK, I WENT TO GET MY FUEL FILTER CHANGED TODAY,,, but i ran a scan @ autozone an they did not find out anything wrong,, no codes came out,, so i went to a local mecanic an he did not find no codes or anything that came up,,,,

so due i wait until the light stays on,, now

 

[outkast]

depends what you wanna do...here is the way I see it..

drive it until the coil starts missing

take it to a dealer (they are about the only people with the equipment to stress test a coil)

bite the bullet and just replace all 8 with plugs, and be done with it.

 

[ELVATO]

depends what you wanna do...here is the way I see it..

drive it until the coil starts missing

take it to a dealer (they are about the only people with the equipment to stress test a coil)

bite the bullet and just replace all 8 with plugs, and be done with it.

Option 3 if you have the money.

You're already past the 100k mile life of them. The longer your wait, the higher the probability that that will break in half when removing them.

As I said earlier, if you are going to take it somewhere, make sure they know about the TSB. Ask them how many 3V 5.4 plug changes they've done without breaking any.

 

[PAPARAZZI]

O.K,, tell me if i should due it like this,, i will go on ebay an buy the 8 motocraft spark plugs for my exp,, then take it to a mecanic who has expirence in this type of suv an have him replace all 8 spark plugs,,

an i should be fine

 

[Stoned06]

If you are going to replace all the plugs (and you should), I would go with a newer one piece design that won't separate at the threads like the OEM plugs. Brisk racing just came out with a one-piece plug for the 3V engines that are designed with the electrode shroud and threads as a single piece shaft. Probably the way I will be going when I change the plugs this summer.

 

[jjbusa]

do the 04 4.6 have the plug breakage problem too or can i tackle it?

 

[ELVATO]

No, the 2V engines don't have the breakage problem. Only the 3V engines do.

Here is the TSB for the 3V 5.4 motor. I think it should be the latest one. Try to find someone who has done it before and who has the tool in case the plugs do break.
http://www.mediafire.com/file/4odwxz55mz4/Broken spark plug procedure.pdf

 

[PAPARAZZI]

if you are going to replace all the plugs (and you should), i would go with a newer one piece design that won't separate at the threads like the oem plugs. Brisk racing just came out with a one-piece plug for the 3v engines that are designed with the electrode shroud and threads as a single piece shaft. Probably the way i will be going when i change the plugs this summer.

due you have a link or part # on those, i will buy them this weekend

 

[PAPARAZZI]

IS THIS THE ONE FOR MY 05 EXPEDITION ,,,